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2012 29th National Radio Science Conference, NRSC 2012

作者： Haraz, Osama M. Abdel-Rahman, Mohamed Ramy Sebak, Abdel-Razik Debbar, Nacer Faculty of Engineering and Computer Science Concordia University Montreal QC Canada KACST Technology Innovation Center in RFTONICS Prince Sultan Advanced Technologies Research Institute King Saud University Riyadh 11421 Saudi Arabia Electrical Engineering Department College of Engineering King Saud University Riyadh 11421 Saudi Arabia

ISBN: (纸本)9781467318853

This paper presents a coplanar waveguide (CPW) fed hybrid monopole/dielectric resonator antenna for W-band imaging system applications. The proposed antenna consists of a CPW-fed printed monopole and cylindrical dielectric resonator. In this hybrid configuration, the printed monopole is used as an effective radiator as well as to excite the dielectric resonator. The obtained simulation results show that the 10 dB return-loss impedance bandwidth of the proposed antenna can reach up to 16% with the center frequency at 101.85 GHz (93.7 GHz-110 GHz). Also, the proposed antenna shows nearly omni directional radiation characteristics with maximum achieved realized gain of about 2.67 dBi at 94 GHz. The prototype fabrication procedure is outlined. © 2012 IEEE.

关键词： Microwave antennas

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Takagi-Sugeno control of the Elevation Channel of A Twin-Rotor System Using Closed-Loop Empirical Data

Takagi-Sugeno Control of the Elevation Channel of A Twin-Rot...

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American control Conference

作者： Hamidreza Azimian Alireza Fatehi Babak N. Araabi Department of Mechanical and Materials Engineering The University of Western Ontario (UWO) London ON Canada Advanced Process Automation and Control (APAC) Research Group Industrial Control Center of Excellence Faculty of Electrical and Computer engineering K. N. Toosi University of Technology Tehran Iran School of Electrical and Computer Engineering University of Tehran Tehran Iran

ISBN: (纸本)9781457710957

In this paper, design of Takagi-Sugeno controllers for a twin-rotor system from empirical data is addressed. First, identification of linear models using Prediction Error Method in the presence of nonlinear distortions and in feedback systems is revisited, and it is demonstrated that feedback nonlinear systems with an integral action can be locally represented by linear models rather than affine models. Moreover, it is demonstrated that how the consistency and unbiasedness of the identified models can be improved by proper design of the experiments. In order to ensure that the unmodeled contributions in the resulting piecewise linear model are sufficiently small, a criterion is proposed based on the small-gain theorem that can be used for unfalsification of the piecewise linear model. Finally, by taking advantage of the separation principle, design of fuzzy Takag-Sugeno state feedback and observer is formulated in terms of Linear Matrix Inequalities (LMIs). The implementation results on the actual system demonstrate significant improvements with respect to the initial controller and previous work on similar systems.

关键词： Nonlinear systems Closed loop systems Observers Uncertainty Data models Predictive models

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B8. CPW fed hybrid planar monopole/dielectric resonator antenna for W-band applications

B8. CPW fed hybrid planar monopole/dielectric resonator ante...

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National Conference on Radio Science (NSRC)

作者： Osama M. Haraz Mohamed Ramy Abdel-Rahman Abdel-Razik Sebak Nacer Debbar Faculty of Engineering and Computer Science Concordia University Montreal Canada KACST Technology Innovation Center in RFTONICS Prince Sultan Advanced Technologies Research Institute King Saud University Riyadh Saudi Arabia Electrical Engineering Department College of Engineering King Saud University Riyadh Saudi Arabia

关键词： Dielectric resonator antennas Dielectrics Resonant frequency Bandwidth Substrates Coplanar waveguides

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Reports of the AAAI 2011 conference workshops

Reports of the AAAI 2011 conference workshops

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作者： Agmon, Noa Agrawal, Vikas Aha, David W. Aloimonos, Yiannis Buckley, Donagh Doshi, Prashant Geib, Christopher Grasso, Floriana Green, Nancy Johnston, Benjamin Kaliski, Burt Kiekintveld, Christopher Law, Edith Lieberman, Henry Mengshoel, Ole J. Metzler, Ted Modayil, Joseph Oard, Douglas W. Onder, Nilufer O'Sullivan, Barry Pastra, Katerina Precup, Doina Ramachandran, Sowmya Reed, Chris Sariel-Talay, Sanem Selker, Ted Shastri, Lokendra Singh, Satinder Smith, Stephen F. Srivastava, Siddharth Sukthankar, Gita Uthus, David C. Williams, Mary-Anne Department of Computer Science University of Texas at Austin United States Center for Knowledge Driven Information Systems Infosys Labs India Adaptive Systems Section Naval Research Laboratory Washington DC United States Department of Computer Science University of Maryland College Park United States EMC's Center of Excellence in Ireland Research Europe at EMC Ireland Department of Computer Science University of Georgia United States School of Informatics University of Edinburgh United Kingdom Department of Computer Science University of Liverpool United Kingdom Department of Computer Science University of North Carolina Greensboro United States Faculty of Engineering and Information Technology University of Technology Sydney Australia VeriSign Inc. United States Department of Computer Science University of Texas at El Paso United States Machine Learning Department Carnegie Mellon University United States Massachusetts Institute of Technology Media Laboratory United States Carnegie Mellon University's Silicon Valley Campus United States Darrell W. Hughes Program for Religion and Science Dialogue Oklahoma City University United States Department of Computing Science University of Alberta Canada College of Information Studies Institute for Advanced Computer Studies University of Maryland College Park United States Department of Computer Science Michigan Technological University United States Department of Computer Science University College Cork Ireland Cognitive Systems Research Insitute Athens Greece School of Computer Science McGill University Canada Stottler Henke Inc. United States School of Computing University of Dundee United Kingdom Department of Computer Engineering Istanbul Technical University Turkey Convergence Lab Infosys Technologies Ltd. United States Department of Electrical Engineering and Computer Science University of Michigan Ann Arbor United States Robotics Institute Carnegie Mellon University United States University of Wisconsin

The AAAI-11 workshop program was held Sunday and Monday, August 7-18, 2011, at the Hyatt Regency San Francisco in San Francisco, California USA. The AAAI-11 workshop program included 15 workshops covering a wide range of topics in artificial intelligence. The titles of the workshops were Activity Context Representation: Techniques and Languages;Analyzing Microtext;Applied Adversarial Reasoning and Risk Modeling;Artificial Intelligence and Smarter Living: The Conquest of Complexity;Artifiicial Intelligence for Data center Management and Cloud Computing;Automated Action Planning for Autonomous Mobile Robots;Computational Models of Natural Argument;Generalized Planning;Human Computation;Human-Robot Interaction in Elder Care;Interactive Decision Theory and Game Theory, 2010;Language-Action Tools for Cognitive Artificial Agents: Integrating Vision, Action, and Language;Lifelong Learning from Sensorimotor Experience;Plan, Activity, and Intent Recognition;and Scalable Integration of Analytics and Visualization. This article presents short summaries of those events. Copyright © 2012, Association for the Advancement of Artificial Intelligence. All rights reserved.

关键词： Human robot interaction

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Metrics-based analysis of thread behavior using an aspect-oriented programming approach

Metrics-based analysis of thread behavior using an aspect-or...

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IEEE International Conference on computer Science and Automation engineering

作者： Alan, Oral Erdoǧan, Nadia Information Technologies Institute Research Center for Advanced Technologies on Informatics and Information Security Kocaeli Turkey Computer Engineering Department Faculty of Electrical and Electronic Engineering Istanbul Technical University Istanbul Turkey

ISBN: (纸本)9781424487257

Understanding thread behavior makes multi-threaded programming easier. Thread behavior can be observed by calculating metrics that are driven from thread state changes and time durations spent in those states. This paper presents the design and implementation of a new thread profiler that builds on aspect-oriented programming (AOP) approach and its use on multi-threaded applications. The new profiler differs from existing profilers in that it adopts a metrics based approach, calculating certain metrics for threads profiled. Also presented is a method to retrieve exact time information at the machine level from the JVM context. The paper concludes with a description of results obtained for thread profiling and metric calculations and a comparison of the overhead the profiler introduces with that of other profilers. © 2011 IEEE.

关键词： Aspect oriented programming

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Dislocation structure of GaN films grown on planar and nano-patterned sapphire

Dislocation structure of GaN films grown on planar and nano-...

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作者： Cao, Wanjun Biser, Jeffrey M. Ee, Yik-Khoon Li, Xiao-Hang Tansu, Nelson Chan, Helen M. Vinci, Richard P. Department of Materials Science and Engineering Center for Advanced Materials and Nanotechnology Lehigh University Bethlehem PA 18015 United States Center for Optical Technologies Department of Electrical and Computer Engineering Lehigh University Bethlehem PA 18015 United States

Plane view and cross-section transmission electron microscopy (TEM) images were used to compare the density, character, and curvature of dislocations developed during metalorganic vapor phase epitaxy (MOVPE) of GaN on planar c-plane sapphire with those developed during growth on nano-patterned c-plane sapphire. Scanning electron microscopy (SEM) characterization of GaN films at different stages of growth for both types of substrates complemented the TEM investigation. GaN growth on wafers patterned with an array of submicron sapphire bumps exhibited relatively uniform nucleation and initial growth, as well as early island coalescence. It is suggested that this coalescence results in a relatively small fraction of dislocations with partial screw character at the surface of the films grown on the patterned substrate, and that this may be responsible for the improvements in carrier lifetime and device efficiency seen in earlier studies on similar sapphire substrates. © 2011 American Institute of Physics.

关键词： Metallorganic vapor phase epitaxy

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Tuning method for second-order active disturbance rejection control

Tuning method for second-order active disturbance rejection ...

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作者： Chen, Xing Li, Donghai Gao, Zhiqiang Wang, Chuanfeng State Key Lab of Power Systems Dept of Thermal Engineering Tsinghua University Beijing 100084 China Center for Advanced Control Technologies Department of Electrical and Computer Engineering Cleveland State University Cleveland OH 44115 United States

ISBN: (纸本)9789881725592

A simple tuning method for second-order active disturbance rejection control (ADRC) that achieves high performance and good robustness for a wide range of processes is presented. ADRC is a novel control strategy whose exciting performance has been shown by literatures. The proposed method makes ADRC become easy to tune and more practical. Once the desired settling time is given, only one parameter need to be tuned during the design procedure, which can be found by monotonously increasing. Examples are given to show the effectiveness and flexibility of the method. Simulations demonstrate that second-order ADRC can handles processes with various characteristics, including low- and high-order, large dead time, non-minimum phase, unstable and distributed parameter systems. © 2011 Chinese Assoc of Automati.

关键词： Monte Carlo methods

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Dependence of functional vulnerabilities to the parameters of the caspase molecular network

Dependence of functional vulnerabilities to the parameters o...

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2011 IEEE Signal Processing in Medicine and Biology Symposium, SPMB 2011

作者： Habibi, I. Abdi, A. Emamian, E.S. Electrical and Computer Engineering Department New Jersey Institute of Technology Newark NJ United States Biological Sciences Department New Jersey Institute of Technology Newark NJ United States Advanced Technologies for Novel Therapeutics Enterprise Development Center Newark NJ United States

ISBN: (纸本)9781467303729

In this paper a systems biology framework for generalized fault diagnosis in the caspase signaling network of biomolecules is studied. This novel method is capable of identifying critical molecules whose dysfunction can affect the network function detrimentally. The generalized vulnerabilities defined and computed in the paper quantify the role of molecules in a complex network. Impact of network input activities and multiple faults are studied as well. The results and methods are useful for quantitative analysis of functional impacts of individual or a group of molecules on the overall performance of molecular signaling networks. © 2011 IEEE.

关键词： Failure analysis

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SPC and Kalman filter-based fault detection and diagnosis for an air-cooled chiller

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Frontiers of electrical and Electronic engineering in China 2011年第3期6卷 412-423页

作者： Biao SUN Peter B.LUH Zheng O’NEILL Center for Intelligent and Networked Systems Department of AutomationTsinghua UniversityBeijing 100084China The Tsinghua-UTC Research Institute for Integrated Building Energy Safety and Control SystemTsinghua UniversityBeijing 100084China Department of Electrical and Computer Engineering University of ConnecticutStorrsCT 06269USA United Technology Research Center United Technologies CorporationHartfordCT 06108USA

Buildings worldwide account for nearly 40%of global energy *** biggest energy consumer in buildings is the heating,ventilation and air conditioning(HVAC)*** HVAC systems,chillers account for a major portion of the energy *** chillers in good conditions through early fault detection and diagnosis is thus a critical *** this paper,the fault detection and diagnosis for an air-cooled chiller with air coming from outside in variable flow rates is *** problem is difficult since the air-cooled chiller is operating under major uncertainties including the cooling load,and the air temperature and flow rate.A potential method to overcome the difficulty caused by the uncertainties is to perform fault detection and diagnosis based on a gray-box model with parameters regarded as *** method is developed and verified by us in another paper for a water-cooled chiller with the uncertainty of cooling *** verification used a Kalman filter to predict parameters of a gray-box model and statistical process control(SPC)for measuring and analyzing their variations for fault detection and *** gray-box model in the method,however,requires that the air temperature and flow rate be nearly *** introducing two new parameters and deleting data points with low air flow rate,the requirement can be satisfied and the method can then be applicable for an air-cooled *** simulation results show that the method with the revised model and some data points dropped improved the fault detection and diagnosis(FDD)performance *** can detect both sudden and gradual air-cooled chiller capacity degradation and sensor faults as well as their recoveries.

关键词： air-cooled chiller fault detection and diagnosis(FDD) statistical process control(SPC) Kalman filter

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Tuning method for second-order active disturbance rejection control

Tuning method for second-order active disturbance rejection ...

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Chinese control Conference (CCC)

作者： Xing Chen Donghai Li Zhiqiang Gao Chuanfeng Wang State Key Lab of Power Systems Dept of Thermal Engineering Tsinghua University Beijing 100084 China The Center for Advanced Control Technologies Department of Electrical and Computer Engineering Cleveland State University OH 44115 USA

关键词： Tuning Robustness Observers Mathematical model Transfer functions Process control Stability analysis

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